Nitric Acid → Ethyl 1-methyl-4-nitroimidazole-2-carboxylate
反応式
[CH3:1][N:2]1[CH:6]=[CH:5][N:4]=[C:3]1[C:7]([O:9][CH2:10][CH3:11])=[O:8].[N+:12]([O-])([OH:14])=[O:13]>S(=O)(=O)(O)O>[CH3:1][N:2]1[CH:6]=[C:5]([N+:12]([O-:14])=[O:13])[N:4]=[C:3]1[C:7]([O:9][CH2:10][CH3:11])=[O:8]参加物
4
反応条件
- 温度
- 0 °C
実験手順
Ethyl 1-methylimidazole-2-carboxylate was carefully dissolved in 1000 mL of concentrated sulfuric acid cooled to 0° C. 90% nitric acid (1 L) was slowly added maintaining a temperature of 0° C. The reaction was then refluxed with an efficient condenser (−20° C.) in a well ventilated hood for 50 min. The reaction was cooled with an ice bath, and quenched by pouring onto 10 L ice. The resulting blue solution was then extracted with 20 L DCM, the combined extracts dried (sodium sulfate) and concentrated in vacuo to yield a tan solid which was recrystallized from 22 L of 21:1 carbon tetrachloride/ethanol. The resulting white crystals are collected by vacuum filtration.